Enough is enough or is it?

I now know how parents who have crackheads as children feel. No matter how much they fuck you over, somehow when they call you up or stop by out of the blue, your love for them and hope that they are ready to make a change overpowers all rational judgement and you let them back in one more time. And for a while it seems that this relationship is gonna have a happy ending. And maybe if you show them enough love and attention they wont need the dsitraction of drugs because your love for them is stronger than their addiction. But in your heart you know that it wont last, and sooner rather than later they will disappoint you and when that day comes and your embarrassed for falling back into that bullshit and hurt because they did you wrong again and worried because you have no idea if they are alive or dead you resolve to yourself that enough is enough! Then time passes, you move on, and put them in the back of your mind until they call again and the dream begins again.